heaeson



(No Model.)

T. ARHEARSON.

RESERVOIR PEN HOLDER. No. 252,034. Patented Jan. 10,1882;

N. PETERS. Phalo-Utho nuhor, Walhinglan, D c.

, UNITED, STATES PATENT- O FICE.

THOMAS A. H'EARSON, or GREENWIGH, COUNTY OF KENT, ENGLAND.

RESERVOIR PEN-HOLDER.

SPECIFICATION forming part of Letters Patent No. 252,034, dated January 10, 1882.

Application filed SeptmberflB, 1881. (No model.) Patented in England March 31, 1881.

To (all whom it may concern: I

Be it known that I, THOMAS ALFRED HEAR.- SON, a subject of the Queen of Great Britain, residing at Greenwich, in the county of Kent, England, have invented certain new and useful Improvements in Reservoir Pen-Holders, (for which I have received Letters Patentin England, No. 1,419, dated March 31, 1881,) of which the following is a copy.

According to this invention I form a reservoir pen-holder of, first, a hollow stem or holder, which serves as a reservoir for the ink, as is usual; second, a pen covered, with the exception ofthe pointsot'itsnibs,withaflexible sheathor nozzle,'made of india-rubber or other suitable material which can be fitted fluid-tight into or I around the lower end of theholder, so that ink may pass from the holder into the interior of the nozzle; third, a small air-tube extending down from a plug, by which the upper end of the ink-holder is closed, or from the upper closed end ofthe holder into the interior of the holder, and having its lower end surrounded by a ho1- low chamber, at the bottom of which is a small outlet for the admission of air into the inkholder. The sheath or nozzle embracing the nibs of the pen prevents the escape of ink at the pen end except when the pen is used for writing, when, by the action of pressing the-penpoints upon the. paper, the nibs are caused to separate, and so form a passage for the ink.- The chamber surrounding the lower end of the air-tube serves to prevent the escape of ink through the air-tube, for should any ink get into the chamber through the aperture at its lower end this ink would not flow into the airtube when the reservoir pen-holder was reversed that is, held pen upward; but since the airtube projects into the chamber, theink would collect at the then lower end of the chamber, around the exterior of the end of the air-tube; or if the reservoir pen-holder were to get heated by being held in the hand or otherwise, the chamber wouldform a temporary receptacle for the ink, that would otherwise be expelled by the expansion of air which would take place in the holder. The lower end of the air-tube with the hollow chamhersurrounding it extends down inside theholder to a point at such a distance from the writingpoint as will correspond to a fluid-head necessary to cause the ink to flow sufficieutly fast. By this arrangement. the fluid head will be constant until the ink in the holder is almost exhausted.

Although in all cases I prefer that the inner end of the air-tube should project into a chamber surrounding it, yet the pen-holder might be made without this chamber.

The drawings annexed show a reservoir penholder constructed according to my invention.

Figure 1 is an exterior view of the reservoir pen-holder. of the same. Fig. 3 is a longitudinal section as viewed at a right angle to Fig. 2, showing portions of. the pen-holder and air-tube, with the chamber and pen-holding piece in place at the ends of the holder and tube, respectively.

Fig. 4 is a longitudinal section, on a larger scale, of the pen covered with its sheath or nozzle. Fig. 5 is a back view of the pen, and Fig. 6 shows on the same scale the sheath or nozzle.

A is the hollow stem forming the ink-holder. Into one end of this holder is screwed a penholding piece, B. This pen-holding piece has a hole formed centrally through it to receive the upper or barrel part of the pen. The penpiece B is removable for the purpose of refilling the holder with ink.

Q is the pen. this pen is cylindrical, to be received into the hole in the peu-holding piece B.

D is the sheath or nozzle, which will stretch over the exterior of the pen 0. This sheath is formed of thin india-rubber or other suitablematerial, so that it will readily stretch and bend. The upper end of the sheath or nozzle is shown to be turned into the interior of the barrel; but this is not essential. The opposite end of the nozzle is closed with the exception of a fine hole or slit, and the nibs of the pen project slightly through this hole or slit, as shown at Fig. 4.

E is a plug by which the upper end of the holder is closed. An air-hole is formed through this plug, and into it is cemented the endof a small tube, G, to form a continuation of the airpassage. The inner end of the air-tube is inserted fluid-tight into a bag or chamber, H, and projects into this chamber. A small hole serving as an air-inlet is also formed in the lower end of the chamber, and the air-tube is Fig. 2 is a longitudinal section The barrel or upper part of ICO made to incline somewhat toone side of the hollow ink-holder A, as shown at Figs. 2 and -3, so that the chamber H may come close to this side and leave a larger space on the opposite side of the chamber H for the free upward passage of air bubbles. The objects gained by the use of the bag or chamber H are clearly explained above. The inner end of the air-tube with the hollow chamber surrounding it extends down inside the chamber to a point atsuch a distance from the writing-point as will correspond to a fluid head necessary to cause the ink to flow sufficiently fast, so that the fluid head may be constant until the ink in the-ink-holder is almost exhausted.

I is a cap by which the pen end of the reservoir pen-holder is protected when the pen is not in use. The ink-holder and the plugs at its ends are preferably made of ebonite; but they might be made of other material.

Having thus described myinvention. I would state that I do not confine myself to the precise form of pen shown, or to the method described of obtaining an ink-tight joint between the holder and nozzle, as the pen may be variously shaped, so long as it can be surrounded by a thin flexible sheath or nozzle and fitted fluid-tight to the end of the ink-holder; but

I claim- 1. The combination, with an ink-holder provided with an air tube, of the pen and the thin flexible nozzle inclosing the pen except at the points of its nibs, substantially as and for the purpose hereinbefore set forth.

2. The combination of a barrel-pen with a flexible sheath or nozzle, substantially as described, so that the barrel of the pen, with the sheath or nozzle surrounding it, may be inserted fluidti ht into the end of an ink-holder.

3. The combination, with the inner end of 40 the air-tube of a reservoir-pen, of a chamber into which the inner end of the air-tube enters, such chamber having a small hole at the bottom, to allow air to pass from it into the interior of the ink-holder.

THOMAS ALFRED HEARSON.

Witnesses:

HENRY F. P. SPRY, W. MONK GOULD. 

